Incorporating uncertainty into life-cycle sustainability assessment of pavement alternatives

Zheng, Xiaoyan; Easa, Said M.; Ji, Tao; Jiang, Zhenliang

doi:10.1016/j.jclepro.2020.121466

Cited by 38 publications

(29 citation statements)

References 23 publications

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“…With regard to the FU, it became evident that the biggest challenge concerning its application was in the S-LCA, whereas for the LCA and LCC, the defined FU was not applied consistently [90][91][92]. Of the 19 studies, 18 showed defined system boundaries for the LCSA and 7 out of 19 studies performed a cradle-to-grave assessment.…”

Section: Frameworkmentioning

confidence: 99%

“…Eight out of 19 studies applied selective weighting (Table 1), fully using the Analytical Hierarchy Process (AHP). Weighting was applied to the pillars (LCA vs. LCC vs. S-LCA) [91,92,98,99,105], which contradicts the approach of Kloepffer and Finkbeiner [13,14]. Impact categories were combined into one indicator through further weighting [88], and weights were applied to indicators within a pillar [101,106].…”

Section: Interpretation Visualization and Weightingmentioning

confidence: 99%

“…In three of 19 case studies, the FU could not be applied to all three assessments; the S-LCA was the main pillar not being implemented with the defined FU [90][91][92]. Further, differently defined lifespans of the buildings among the different studies make a comparison of the studies and their results complex [58,68,110].…”

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confidence: 99%

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Application of Life Cycle Sustainability Assessment in the Construction Sector: A Systematic Literature Review

Backes

Traverso

2021

Processes

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This paper reviews actual sustainability assessments in the construction sector to define whether and how a Life Cycle Sustainability Assessment (LCSA) is applied and interpreted in this sector today. This industry has large shares in global energy (33%), raw material consumption (40%) and solid waste generation (40%). Simultaneously, it drives the economy and provides jobs. The LCSA is a method to identify environmental, social and economic impacts of products/services along their life cycles. The results of this study showed a mismatch between sectoral emissions and the number of LCSA-based impact evaluations. It was found that only 11% of papers reviewed assessed all three sustainability pillars. The economic and especially the social pillars were partly neglected. In Life Cycle Assessments (LCAs), 100% made use of Global Warming Potential (GWP) but only 30% assessed more than five indicators in total. In Life Cycle Costing (LCC), there were a variety of costs assessed. Depreciation and lifetime were mainly neglected. We found that 42% made use of Net Present Value (NPV), while over 50% assessed individual indicators. For the Social Life Cycle Assessment (S-LCA), the focus was on the production stage; even the system boundaries were defined as cradle-to-use and -grave. Future approaches are relevant but there is no need to innovate: a proposal for a LCSA approach is made.

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Section: Frameworkmentioning

confidence: 99%

Section: Interpretation Visualization and Weightingmentioning

confidence: 99%

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Application of Life Cycle Sustainability Assessment in the Construction Sector: A Systematic Literature Review

Backes

Traverso

2021

Processes

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“…The choice of these slags for the proposed purpose is motivated by the importance of these aggregates in this material in a generalized way, by the relevance of this material in road infrastructures and by the very important demand for it in this type of infrastructure. For this purpose, and as a novelty with respect to other research relating to life cycle studies [ 27 ], the slag has been physically, chemically and mechanically characterized, thus determining its suitability, as well as the material it could replace within the bituminous mixtures. In this way, it has been possible to objectively evaluate whether its use entails the shortest working life of the final conformed product.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Chemical, Physical and Mechanical Characteristics of Electric Arc Furnace Slags and Environmental Evaluation of the Process for Their Utilization as an Aggregate in Bituminous Mixtures

et al. 2021

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Road construction is an activity that demands a significant amount of aggregates for bituminous mixtures. In addition, these aggregates must be of a suitable quality for use, even more so on high traffic roads. In response to this problem, and in order to avoid the extraction of new raw materials, research is being carried out using industrial waste as a substitute for conventional aggregates. In this way, the extraction of raw materials is reduced and landfilling of waste is avoided. However, these wastes must have certain properties and environmental advantages over natural aggregates. Otherwise, the use of waste would not be environmentally beneficial but would be more damaging to the environment. For this reason, this research evaluates the viability of using electric arc furnace slag as aggregates for bituminous mixtures, the main objectives being the determination of the characteristics of the by-product, the particularities and the critical points to be taken into account for its subsequent use in mixtures. At the same time, the environmental advantages of treating this waste to obtain a usable aggregate are evaluated in comparison with the processing of a natural aggregate. The results showed that electric arc furnace slags have a suitable chemical composition and excellent physical and mechanical properties for use in bituminous mixtures, even on high traffic roads. At the same time, it was determined that their use produces a considerable reduction in environmental afflictions. Therefore, it could be affirmed that the use of electric arc furnace slags in bituminous mixtures is recommendable as a way to develop more sustainable materials for construction.

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“…These materials represent a new working paradigm, with the sole purpose of providing materials with similar or superior characteristics to the traditional ones but with an optimization in their manufacturing process and in the use of raw materials [3]. Therefore, they significantly reduce the carbon footprint in their life cycle assessment [4].…”

Section: Introductionmentioning

confidence: 99%

Development of Porous Asphalt with Bitumen Emulsion, Electric arc Furnace Slag and Cellulose Fibers for Medium Traffic Roads

Terrones-Saeta¹,

Suárez-Macías²,

Iglesias-Godino³

et al. 2020

Minerals

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The construction of road infrastructure is one of the most polluting activities that exists today. Therefore, the use of waste from other industries is an excellent solution, since it reduces the consumption of raw materials, reduces CO2 emissions and avoids the disposal of waste in a landfill. In this study, electric arc furnace slag, cellulose fibers from the papermaking industry and bitumen emulsion were used for the conformation of sustainable and porous bituminous mixtures. Electric arc furnace slag was used as a high-resistance aggregate with a capacity sufficient to support traffic loads. Cellulose fibers were added to increase the percentage of binder in the mixture without bleeding problems, thereby achieving greater tensile strength. To do this, first the waste was physically and chemically characterized, then different mixtures were conformed and finally the mixtures were studied by means of the loss by wear and Marshall tests. The results reflected an optimal combination of materials that provided the best results in the mechanical tests, obtaining much better results than the mixtures with discontinuous grading and traditional bitumen emulsion. Therefore, a sustainable, porous and economical mixture for road use is obtained in this research.

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Incorporating uncertainty into life-cycle sustainability assessment of pavement alternatives

Cited by 38 publications

References 23 publications

Application of Life Cycle Sustainability Assessment in the Construction Sector: A Systematic Literature Review

Application of Life Cycle Sustainability Assessment in the Construction Sector: A Systematic Literature Review

Determination of the Chemical, Physical and Mechanical Characteristics of Electric Arc Furnace Slags and Environmental Evaluation of the Process for Their Utilization as an Aggregate in Bituminous Mixtures

Development of Porous Asphalt with Bitumen Emulsion, Electric arc Furnace Slag and Cellulose Fibers for Medium Traffic Roads

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